Lings, Martin. <br/><br/>
What is Sufism? / 
Martin Lings. 
 - London :  George Allen & Unwin Ltd.,  1975. 
 - 139 p. ;  24 cm. 
<br/><br/> Originally published: London : Allen and Unwin, 1975  Includes index. 
<br/><br/><label>ISBN: </label>0042970318 (hbk.)  GBP2.50 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Sufism.